Radio Baghdad announced that Iraqi jets, keeping up the pressure in the renewed ``tanker war,`` had hit a ship, later identified by shipping sources as the 21,166-ton shuttle tanker Marianthi M.

Iran confirmed that one crewman was killed and another wounded in the raid, 60 miles south of Iran`s Kharg Island oil terminal. A spokesman for Propontis, the London-based firm that manages the Marianthi M, said an unexploded Exocet missile was lodged in the ship.

Iraq also reported raiding a refinery and power complex in the central Iranian city of Isfahan, an oil products center in the western city of Khorramabad and a manufacturing center in Ilam, 25 miles east of the Iran-Iraq border.

The latest Iraqi attacks followed a raid Saturday south of Kharg Island in which the 239,435-ton Liberian-resistered Rova was reported to have been seriously damaged by two missiles.

Shipping sources here said that ship, one of 26 chartered by Iran to shuttle oil from Kharg to points farther down the gulf, was hit in its engine room while sailing empty and was still burning Monday. Two crewmen died in the attack and four were missing.

The shipping sources said renewed Iraqi air raids have knocked out 6 of 10 loading terminals at Kharg Island and have disrupted Iran`s efforts to shuttle oil south.

Another ship attacked by Iraq Saturday, the Cypriot-registered Merlin, was reported to be under tow to Dubai with an unexploded missile still on board.

Meanwhile, the American-escorted convoy of four tankers was believed to be approaching Kuwait after entering the gulf early Sunday, the 11th such convoy escorted under the Reagan administration program begun in July. The tankers were being escorted by three U.S. Navy guided-missile frigates and the 8,600-ton dock landing ship Mt. Vernon, in the gulf for the first time.

Iran accuses Kuwait of aiding Iraq in the 7-year-old Iran-Iraq war and has targeted its shipping. More than 30 U.S. warships are in the gulf region, along with warships from Britain, France, Italy and the Soviet Union.

There has been no Iranian military reprisal and relatively little bellicose rhetoric in response to the latest U.S.-Iranian clash, in which U.S. helicopters last Thursday attacked three small Iranian patrol boats off Iran`s Al Farsiyah Island, sinking one and disabling the other two.

The Iranians ``know what it means to confront the U.S., so I believe they will not do so,`` Iraqi President Saddam Hussein said in an interview published Monday in the Kuwaiti daily Al-Siyassa.

But shipping sources here said they were apprehensively awaiting an Iranian response to the incident.

A U.S. Navy official said American forces were working to recover the 42- foot, Swedish-built Boghammer patrol boat that Army helicopters sank on Thursday. He said authorities believe the vessel was heavily armed.

U.S. military officers have refused to allow journalists to see and photograph the two Iranian speedboats that were disabled and seized in the same clash.

The U.S. Central Command released photographs of the speedboats, one of which was altered to obliterate the background. Command spokesman Lt. Col. John Head would only say that the pictures had been taken in the gulf.

Two of the photos, including the altered one, showed the burned hull of a twin-engine speedboat.

``There was something in the background taken out,`` Head told reporters. ``It wasn`t part of the boat. It was considered operationally sensitive.``

The military has not released videotapes it took of the aftermath of the clash. Nor have pictures been released of the four injured Iranians who were taken into U.S. custody after the firefight. A U.S. Navy official said Monday the four were in ``stable condition.`` Two other Iranians captured by the Americans died of battle wounds.